Helena Valley Regulating Reservoir Weather Forecast

    • 45
    • 82

    Mostly Sunny

    • 37
    • 73

    Rain Showers

    • 33
    • 46

    Rain Showers

    • 35
    • 60

    Partly Sunny

    • 44
    • 75

    Mostly Sunny

    • 45
    • 78

    Slight Chance Rain Showers

Today 3 May Helena Valley

Sunny. Highs around 80. Southeast Winds up to 10 Mph.

Tonight 3 May Helena Valley

Partly cloudy. Lows in the mid 40s. Southeast Winds 5 to 10 Mph shifting to the southwest after midnight.

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Helena Valley Regulating Reservoir Temperature Statistics

May Temperature

Helena Regional Airport (5.6 miles)

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  • Average May

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Climate (2020–Present)

Helena Regional Airport (5.6 miles)

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  • Average Low 2020–2025

    36.1 °F

  • Average 2020–2025

    47.4 °F

  • Average High 2020–2025

    59.2 °F
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